Alert archive / Pennsylvania / Tornado Warnings in 2019

Tornado Warning 4, NWS State College, PA

April 19, 2019Franklin County, Pennsylvania

NWS State College, PA issued this tornado warning at Apr 19, 2019, 8:27 PM EDT for Franklin County, Pennsylvania. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 19, 2019, 8:27 PM EDT (00:27 UTC)
Expired: Apr 19, 2019, 8:43 PM EDT
In force: 16 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Franklin County, PA

The radar

The Sterling radar (KLWX), 108 km from the middle of the area, began a volume at 00:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 19, 6:34 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 112 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 429 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 718 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 315 m²/s²
0-3 km storm-relative helicity: 408 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.8

Open this sounding in Storm Lab

The text

As transmitted.

985 
WFUS51 KCTP 200027
TORCTP
PAC055-200100-
/O.NEW.KCTP.TO.W.0004.190420T0027Z-190420T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service State College PA
827 PM EDT FRI APR 19 2019

The National Weather Service in State College PA has issued a

* Tornado Warning for...
  Southeastern Franklin County in south central Pennsylvania...

* Until 900 PM EDT.
    
* At 827 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Wayne Heights, moving north at 55 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Waynesboro, Wayne Heights and Rouzerville around 830 PM EDT.
  Mont Alto, Fayetteville and Guilford around 840 PM EDT.
  Shippensburg and Scotland around 850 PM EDT.

Other locations impacted by this tornadic thunderstorm include Quincy
and Penn State Mont Alto.

This includes Interstate 81 from mile markers 15 to 25.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4013 7757 4002 7751 3998 7746 3995 7747
      3972 7746 3972 7771
TIME...MOT...LOC 0027Z 199DEG 47KT 3971 7759 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

Jurewicz

1 follow-up statement

505 
WWUS51 KCTP 200043
SVSCTP

Severe Weather Statement
National Weather Service State College PA
843 PM EDT FRI APR 19 2019

PAC055-200052-
/O.CAN.KCTP.TO.W.0004.000000T0000Z-190420T0100Z/
Franklin PA-
843 PM EDT FRI APR 19 2019

...THE TORNADO WARNING FOR SOUTHEASTERN FRANKLIN COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
south central Pennsylvania.

LAT...LON 4013 7757 4002 7751 3998 7746 3995 7747
      3972 7746 3972 7771
TIME...MOT...LOC 0041Z 199DEG 47KT 4003 7746 

$$

Jurewicz

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 19, 8:11 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Franklin	49 min
Apr 19, 8:34 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Franklin	41 min
Apr 19, 9:11 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Perry	34 min
Apr 19, 9:26 PM EDT	Special Weather Statement	CTP	Montour, Sullivan	49 min
Apr 19, 9:36 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Montour, Northumberland, Snyder	54 min
Apr 19, 9:44 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Juniata, Montour, Northumberland and 5 more	3 hr
Apr 19, 10:56 PM EDT	Areal Flood Advisory	CTP	Columbia, Lycoming, Sullivan	3 hr
Apr 20, 12:24 AM EDT	Areal Flood Advisory	CTP	Tioga	4 hr
Apr 20, 3:43 PM EDT	Special Weather Statement	CTP	Warren	32 min
Apr 20, 4:33 PM EDT	Special Weather Statement	CTP	Warren	42 min
Apr 20, 7:25 PM EDT	Special Weather Statement	CTP	Elk	35 min
Apr 20, 7:37 PM EDT	Special Weather Statement	CTP	McKean	23 min
Apr 20, 7:59 PM EDT	Special Weather Statement	CTP	Elk	46 min

Nearby

Tornado Warnings in Pennsylvania, 2019 Every tornado warning in 2019 Tornadoes in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.